If you’ve got an account with Seme-nedis or could be just Nedis now, they do some pattern brushes which are as good as genuine. Trouble is you really need to know the part number, otherwise it’s virtually impossible to find anything on their site. Phone call would probably work OK. 0871 222 6655 (10p/min). Oh, hang on a minute. I think it’s W1-18011/A (their pattern no.) you need. Order two as they’re priced in singles.
Mike.